The students are cleaning the classroom . ( 改一般疑问句并作肯定和否定回答)
问题描述：
The students are cleaning the classroom . ( 改一般疑问句并作肯定和否定回答)
答
Are the students cleaning the classroom?
Yes, they are.
No, they aren't.
(N.B.下次记得把Be动词提前就行了）